So first of all I apologise to moderators if this topic dosen't belong in this section but as Return to Arkham dosen't have its own I thought this is the best place to ask this question. So I have Return to Arkham on PS4. And on my first playtrough of Harley Quinn's Revenge I didn't collect all balloons. On my second playthrough by using guide I collected 29/30 balloons. And then using guide twice I couldn't find last balloon. So my question is is this bug and is there a way to slove this problem? Is there anything I can do to make last balloon appear?